JP2628239B2 - Fire location detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire occurrence position recognition device used in a disaster prevention system for monitoring a large space such as a plant facility.

[0002]

2. Description of the Related Art When a fire occurs in a large space such as a plant facility, an event hall, or a sports facility,
In a disaster prevention system that monitors this, it is necessary to know the fire occurrence position quickly and accurately for controlling the fire extinguishing agent discharge nozzle of the fire extinguisher, determining the evacuation guidance direction, selecting control of smoke prevention equipment, and the like.

[0003] From this, it has been known in the past that
A device for visually recognizing a fire occurrence position as disclosed in Japanese Patent No. 4693 has been devised. That is, in FIG. 3 of the publication, a district discriminating plate is provided below the screen of the receiver 61 to indicate which part of the screen corresponds to which fire extinguishing area.
Aiming switches Sa to Sf of fire extinguishing agent discharge nozzles corresponding to the fire extinguishing areas are provided below each section of the area discriminating board.
A fire is determined by using a district discriminating board to determine which fire area is the fire spot displayed on the screen of the receiver 61 and operating an aiming switch below the fire extinguishing area to control the extinguishing agent discharge nozzle. A position viewing device is shown.

[0004] However, in such a device for visually recognizing a fire occurrence position, it is necessary to check the fire occurrence point reflected in the screen of the receiver while seeing the screen. However, there is a disadvantage that the fire occurrence position is not clearly displayed on the screen, and it is difficult to specify the fire occurrence position.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has an image information of a site obtained from a surveillance television camera, a surveillance system having a plurality of surveillance viewing angles. Information obtained from a fire sensor composed of a divided array sensor or the like for detecting whether a fire has occurred at a viewing angle of the fire sensor is superimposed, and a grid corresponding to the divided viewing angle of the fire sensor is displayed on a screen for monitoring. It is an object of the present invention to provide a fire occurrence position visualization device which can promptly and accurately recognize a fire occurrence point by displaying the image on a television receiver.

[0006]

SUMMARY OF THE INVENTION The gist of the present invention resides in that image information of a site obtained from a surveillance television camera, a surveillance viewing angle divided into a plurality of fields, Information obtained from a fire sensor that detects whether a fire has occurred at a corner is superimposed on a monitor television receiver that displays a grid corresponding to the divided viewing angle of the fire sensor on a screen. And a fire occurrence position recognition device.

[0007]

Next, the operation of the present invention will be described. When a fire occurs, the situation of the site is displayed on the monitoring television receiver. At this time, information from the fire sensor is also displayed on the monitoring television receiver. In addition, a grid corresponding to the divided viewing angle of the fire sensor is displayed on the monitoring television receiver, and the viewing angle portion of the point where the fire has occurred looks different from the others. Can be seen at a glance and the fire situation can be seen at the same time.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram of an embodiment of a fire occurrence position recognition device according to the present invention, FIG. 2 is an explanatory diagram of an arrangement of a monitoring television camera and a fire sensor, and FIG. 3 is an explanatory diagram of a method of calculating a distance to a fire occurrence point. FIG. 4 is a front view of the monitoring television receiver.

In FIG. 1, reference numeral 1 denotes a monitoring television camera, and 2 denotes a frame data transfer unit. Reference numeral 3 denotes a fire sensor having a plurality of divided monitoring viewing angles and detecting at which viewing angle a fire has occurred. The fire sensor 3 is operated integrally with the surveillance television camera 1 toward the same field of view. It is set by remote control from. In this embodiment, the fire sensor 3 uses a divided array sensor. Further, the divided array sensor adopts one of the following two methods.

First, the first method is to condense light from a divided viewing angle via a mirror or a lens and make the light incident on the corresponding array-shaped sensor. And the signal processing is the one that catches fluctuation,
A signal change component obtained from the divided area is analyzed to determine whether a fire has occurred, and in the case of capturing an energy level, an optical chopper process is performed to compare with a reference temperature to determine whether a fire has occurred. Things.

[0011] The second method is to scan a horizontal or vertical rotating mirror to form a temperature pattern of a fixed field of view, as in infrared thermography, and to determine the occurrence and location of a fire by the size and expansion of the temperature distribution. Is to sense. Also,
4 is a preamplifier, 5 is a filter, 6 is a level amplifier, 7
Denotes a CPU, and 8 denotes a receiving board I / F.

Reference numeral 9 denotes a monitoring television receiver installed on a central monitoring panel. 9a is a screen of the monitoring television receiver. Further, the monitoring television receiver 9 displays an XY grid on its screen 9a in accordance with the divided viewing angle of the divided array sensor 3. The display method may be such that a sticker or the like on which a grid corresponding to the divided viewing angle is printed is stuck or drawn on the screen by software. Further, the monitoring television receiver 9 may be kept on at all times, or may be turned on only at the time of fire or inspection.

Reference numeral 10 denotes a monitoring television camera I / F, 11 denotes a divided array sensor I / F, 12 denotes a CPU, and 13 denotes an external device control I / F.

As shown in FIGS. 2 and 3, the monitoring television camera 1 and the fire sensor 3 are arranged on the left and right at a small distance l, and are directed to the same field of view and are used for monitoring. Since the information from the television camera 1 and the information from the fire sensor 3 are projected on the same screen of the monitoring television receiver 9 and are always moved integrally with the field of view, two-point distance measurement is performed. It is also possible to calculate the distance to the fire spot using the principle of the law.

If the distance to the fire occurrence point can be accurately calculated in this way, the angle of the fire extinguisher discharge nozzle and the water discharge pressure can be adjusted to the distance, and fire can be efficiently extinguished. is there.

[0016]

Since the present invention has the above-described structure and operation, it is possible to quickly and accurately recognize the fire occurrence point from the screen of the monitoring television receiver even if the temporary smoke is full. is there. At the same time, the status of the fire can be checked, and appropriate and prompt fire extinguishing activities can be performed.

[Brief description of the drawings]

FIG. 1 is a system diagram of an embodiment of a fire occurrence position recognition device according to the present invention.

FIG. 2 is an explanatory diagram of an arrangement of a monitoring television camera and a fire sensor.

FIG. 3 is an explanatory diagram of a method of calculating a distance to a fire occurrence point.

FIG. 4 is a front view of the monitoring television receiver.

[Explanation of symbols]

 1 surveillance television camera 3 fire sensor 9 surveillance television receiver

Claims (2)

(57) [Claims] 1. Field image information obtained from a monitoring television camera, and information obtained from a fire sensor having a plurality of divided monitoring viewing angles and detecting at which viewing angle a fire has occurred. A fire occurrence position visualization device, wherein a grid corresponding to the divided viewing angle of the fire sensor is projected on a monitoring television receiver displayed on a screen. 2. The apparatus according to claim 1, wherein the fire sensor is a divided array sensor.